From 4676653c8423eb3da37cd5916f3e901fca226e66 Mon Sep 17 00:00:00 2001
From: Joshua Goins <josh@redstrate.com>
Date: Mon, 2 Jun 2025 21:48:48 -0400
Subject: [PATCH] Add g_PbrParameterCommon buffer to the Dawntrail renderer

---
 renderer/include/gamerenderer.h  |  1 +
 renderer/include/shaderstructs.h |  5 +++++
 renderer/src/gamerenderer.cpp    | 13 +++++++++++++
 3 files changed, 19 insertions(+)

diff --git a/renderer/include/gamerenderer.h b/renderer/include/gamerenderer.h
index f916b52..f0e7cc2 100644
--- a/renderer/include/gamerenderer.h
+++ b/renderer/include/gamerenderer.h
@@ -102,6 +102,7 @@ private:
     Buffer g_DecalColor;
     Buffer g_AmbientParam;
     Buffer g_ShaderTypeParameter;
+    Buffer g_PbrParameterCommon;
 
     Buffer m_planeVertexBuffer;
 
diff --git a/renderer/include/shaderstructs.h b/renderer/include/shaderstructs.h
index a2b7127..055f48b 100644
--- a/renderer/include/shaderstructs.h
+++ b/renderer/include/shaderstructs.h
@@ -109,3 +109,8 @@ struct AmbientParameters {
 struct ShaderTypeParameter {
     glm::vec4 m[2044];
 };
+
+// Dawntrail
+struct PbrParameterCommon {
+    glm::vec4 unk;
+};
diff --git a/renderer/src/gamerenderer.cpp b/renderer/src/gamerenderer.cpp
index 505757b..370ddd9 100644
--- a/renderer/src/gamerenderer.cpp
+++ b/renderer/src/gamerenderer.cpp
@@ -231,6 +231,17 @@ GameRenderer::GameRenderer(Device &device, GameData *data)
         m_device.copyToBuffer(g_ShaderTypeParameter, &shaderTypeParameter, sizeof(ShaderTypeParameter));
     }
 
+    // pbr common parameter
+    if (m_dawntrailMode) {
+        g_PbrParameterCommon = m_device.createBuffer(sizeof(PbrParameterCommon), VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT);
+        m_device.nameBuffer(g_PbrParameterCommon, "g_PbrParameterCommon");
+
+        PbrParameterCommon pbrParameterCommon{};
+        pbrParameterCommon.unk = {31.01465, 30.99805, 1.00, 0.00};
+
+        m_device.copyToBuffer(g_PbrParameterCommon, &pbrParameterCommon, sizeof(PbrParameterCommon));
+    }
+
     VkSamplerCreateInfo samplerInfo = {};
     samplerInfo.sType = VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO;
     samplerInfo.magFilter = VK_FILTER_NEAREST;
@@ -1399,6 +1410,8 @@ GameRenderer::createDescriptorFor(const DrawObject *object, const CachedPipeline
                         useUniformBuffer(g_AmbientParam);
                     } else if (strcmp(name, "g_ShaderTypeParameter") == 0) {
                         useUniformBuffer(g_ShaderTypeParameter);
+                    } else if (strcmp(name, "g_PbrParameterCommon") == 0) {
+                        useUniformBuffer(g_PbrParameterCommon);
                     } else {
                         qInfo() << "Unknown resource:" << name;
                         info->buffer = m_dummyBuffer.buffer;